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From: Avi Kivity <avi@redhat.com>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Asias He <asias.hejun@gmail.com>,
	Sasha Levin <levinsasha928@gmail.com>,
	kvm@vger.kernel.org, mingo@elte.hu, gorcunov@gmail.com
Subject: Re: [PATCH v2] kvm tools: Support multiple net devices
Date: Mon, 26 Sep 2011 19:21:21 +0300	[thread overview]
Message-ID: <4E80A681.5030003@redhat.com> (raw)
In-Reply-To: <alpine.LFD.2.02.1109261753520.2347@tux.localdomain>

On 09/26/2011 05:54 PM, Pekka Enberg wrote:
> On Mon, 26 Sep 2011, Asias He wrote:
>> $ ./kvm run -n mode=tap
>>
>>
>> [    1.490781] registered taskstats version 1
>> [    1.492781] BUG: unable to handle kernel NULL pointer dereference at
>> 0000001c
>> [    1.493781] IP: [<c14f3236>] virtnet_poll+0x16e/0x408
>> [    1.493781] *pde = 00000000
>> [    1.493781] Oops: 0000 [#1] PREEMPT SMP
>> [    1.493781] Modules linked in:
>> [    1.493781]
>> [    1.493781] Pid: 1, comm: swapper Tainted: G        W   3.1.0-rc3+ 
>> #77
>> [    1.493781] EIP: 0060:[<c14f3236>] EFLAGS: 00010286 CPU: 1
>> [    1.493781] EIP is at virtnet_poll+0x16e/0x408
>> [    1.493781] EAX: 00001000 EBX: db4bb0c0 ECX: db7cd778 EDX: 00001000
>> [    1.493781] ESI: 00000000 EDI: db7cd6c0 EBP: db487fa8 ESP: db487f64
>> [    1.493781]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>> [    1.493781] Process swapper (pid: 1, ti=db486000 task=db450000
>> task.ti=db458000)
>> [    1.493781] Stack:
>> [    1.493781]  db487f98 19dfb000 db5e1400 00000080 c1b0df60 db6ff000
>> 00000000 00000010
>> [    1.493781]  00000080 dbcebfe0 db5e1414 db5e1000 ffffffff fffec005
>> db5e1414 db906dc0
>> [    1.493781]  c1a39a0c db487fd4 c15e4869 fffb71f7 db906dc8 00000080
>> 0000012c 00000000
>> [    1.493781] Call Trace:
>> [    1.493781]  [<c15e4869>] net_rx_action+0x8e/0x177
>> [    1.493781]  [<c1066128>] __do_softirq+0xa7/0x158
>> [    1.493781]  [<c1066081>] ? __tasklet_hi_schedule_first+0x2b/0x2b
>> [    1.493781] <IRQ>
>> [    1.493781]  [<c1065e82>] ? _local_bh_enable_ip.isra.9+0x65/0x86
>> [    1.493781]  [<c1065eab>] ? local_bh_enable_ip+0x8/0xa
>> [    1.493781]  [<c16a7a78>] ? _raw_spin_unlock_bh+0x18/0x1a
>> [    1.493781]  [<c15e59c5>] ? dev_set_rx_mode+0x22/0x26
>> [    1.493781]  [<c15e5a5f>] ? __dev_open+0x96/0xa6
>> [    1.493781]  [<c15e5c23>] ? __dev_change_flags+0x97/0x10e
>> [    1.493781]  [<c15e5cfe>] ? dev_change_flags+0x13/0x3f
>> [    1.493781]  [<c1acfe6f>] ? ip_auto_config+0x160/0xcf8
>> [    1.493781]  [<c1393c86>] ? extract_entropy+0x45/0x71
>> [    1.493781]  [<c1059e35>] ? get_parent_ip+0xb/0x31
>> [    1.493781]  [<c16aa6b7>] ? sub_preempt_count+0x7c/0x89
>> [    1.493781]  [<c16a7d24>] ? _raw_spin_unlock+0x1c/0x27
>> [    1.493781]  [<c1629173>] ? 
>> tcp_set_default_congestion_control+0x8c/0x95
>> [    1.493781]  [<c1001159>] ? do_one_initcall+0x71/0x114
>> [    1.493781]  [<c1acfd0f>] ? root_nfs_parse_addr+0x91/0x91
>> [    1.493781]  [<c1a9c7ab>] ? kernel_init+0xab/0x11d
>> [    1.493781]  [<c1a9c700>] ? start_kernel+0x301/0x301
>> [    1.493781]  [<c16acfb6>] ? kernel_thread_helper+0x6/0xd
>> [    1.493781] Code: 89 d8 e8 23 94 0e 00 8b 4d dc 89 c7 f3 a4 8b 55 dc
>> 8b 4d d8 29 55 f0 8b 75 e0 01 d1 eb 13 8d 45 f0 89 f2 50 89 d8 e8 ae f2
>> ff ff <8b> 76 1c 31 c9 58 83 7d f0 00 75 e7 85 f6 89 75 e0 0f 84 6e 02
>> [    1.493781] EIP: [<c14f3236>] virtnet_poll+0x16e/0x408 SS:ESP
>> 0068:db487f64
>> [    1.493781] CR2: 000000000000001c
>> [    1.549772] ---[ end trace 4eaa2a86a8e2da27 ]---
>> [    1.550772] Kernel panic - not syncing: Fatal exception in interrupt
>> [    1.551772] Pid: 1, comm: swapper Tainted: G      D W   3.1.0-rc3+ 
>> #77
>> [    1.553771] Call Trace:
>> [    1.553771]  [<c169ca33>] panic+0x58/0x156
>> [    1.554771]  [<c16a921a>] oops_end+0x8c/0x9b
>> [    1.555771]  [<c169c4e7>] no_context+0x116/0x120
>> [    1.555771]  [<c169c5e1>] __bad_area_nosemaphore+0xf0/0xf8
>> [    1.557771]  [<c169c5f6>] bad_area_nosemaphore+0xd/0x10
>> [    1.558771]  [<c16aa4b5>] do_page_fault+0x174/0x2fa
>> [    1.559770]  [<c107bad0>] ? sched_clock_local+0x10/0x14b
>> [    1.560770]  [<c15db33f>] ? __netdev_alloc_skb+0x17/0x34
>> [    1.561770]  [<c10e9b84>] ? __kmalloc_track_caller+0xb7/0xc7
>> [    1.563770]  [<c15db33f>] ? __netdev_alloc_skb+0x17/0x34
>> [    1.564770]  [<c16aa341>] ? spurious_fault+0xa8/0xa8
>> [    1.565770]  [<c16a89d6>] error_code+0x5a/0x60
>> [    1.566769]  [<c16aa341>] ? spurious_fault+0xa8/0xa8
>> [    1.567769]  [<c14f3236>] ? virtnet_poll+0x16e/0x408
>> [    1.567769]  [<c15e4869>] net_rx_action+0x8e/0x177
>> [    1.568769]  [<c1066128>] __do_softirq+0xa7/0x158
>> [    1.569769]  [<c1066081>] ? __tasklet_hi_schedule_first+0x2b/0x2b
>> [    1.569769] <IRQ>  [<c1065e82>] ? 
>> _local_bh_enable_ip.isra.9+0x65/0x86
>> [    1.570769]  [<c1065eab>] ? local_bh_enable_ip+0x8/0xa
>> [    1.571769]  [<c16a7a78>] ? _raw_spin_unlock_bh+0x18/0x1a
>> [    1.571769]  [<c15e59c5>] ? dev_set_rx_mode+0x22/0x26
>> [    1.572768]  [<c15e5a5f>] ? __dev_open+0x96/0xa6
>> [    1.573768]  [<c15e5c23>] ? __dev_change_flags+0x97/0x10e
>> [    1.573768]  [<c15e5cfe>] ? dev_change_flags+0x13/0x3f
>> [    1.574768]  [<c1acfe6f>] ? ip_auto_config+0x160/0xcf8
>> [    1.574768]  [<c1393c86>] ? extract_entropy+0x45/0x71
>> [    1.575768]  [<c1059e35>] ? get_parent_ip+0xb/0x31
>> [    1.576768]  [<c16aa6b7>] ? sub_preempt_count+0x7c/0x89
>> [    1.576768]  [<c16a7d24>] ? _raw_spin_unlock+0x1c/0x27
>> [    1.577768]  [<c1629173>] ? 
>> tcp_set_default_congestion_control+0x8c/0x95
>> [    1.578768]  [<c1001159>] ? do_one_initcall+0x71/0x114
>> [    1.578768]  [<c1acfd0f>] ? root_nfs_parse_addr+0x91/0x91
>> [    1.579767]  [<c1a9c7ab>] ? kernel_init+0xab/0x11d
>> [    1.580767]  [<c1a9c700>] ? start_kernel+0x301/0x301
>> [    1.581767]  [<c16acfb6>] ? kernel_thread_helper+0x6/0xd
>> [    1.582767] Rebooting in 1 seconds..
>>  # KVM session ended normally.
>
> This needs fixing before I can apply the patch, right?

Looks like a guest kernel bug, no?

-- 
error compiling committee.c: too many arguments to function


  parent reply	other threads:[~2011-09-26 16:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-25 11:11 [PATCH v2] kvm tools: Support multiple net devices Sasha Levin
2011-09-26  6:10 ` Pekka Enberg
2011-09-26 11:57 ` Asias He
2011-09-26 11:59   ` Sasha Levin
2011-09-26 12:11     ` Asias He
2011-09-26 12:14       ` Sasha Levin
2011-09-26 12:22         ` Asias He
2011-09-26 14:54   ` Pekka Enberg
2011-09-26 15:05     ` Asias He
2011-09-26 16:21     ` Avi Kivity [this message]
2011-09-26 16:37       ` Sasha Levin
2011-09-26 16:46         ` Pekka Enberg

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